MAT 510 Week 11 Assignment Help

MAT 510 Week 11 Assignment Help | strayer university

Question 1

Problem solving activities typically include:                             

                       

Question 2

It is, unfortunately, common in business for managers to demand an explanation for variation that is, based on statistics, typical and expected variation, i.e., common cause variation. Alternatively, there may be obvious special causes in the data that may be shrugged off as “typical business fluctuations”. Which of the following statements about interpretation of variation are true?                                 

Question 3

Service processes are different from manufacturing processes in that:                                 

                       

Question 4

We measure, monitor and improve process cycle time because:                                

                       

Question 5

Use of subject matter knowledge is a key aspect of the Statistical Thinking Strategy discussed in Chapter 2. For which of the following case studies in Chapter 4 was this principle NOT clearly applied?                        

                       

Question 6

Control limits were originally defined at the three-sigma level because:                              

                       

Question 7

A main purpose of a control chart is to:                          

                       

Question 8

In evaluating data on our process outputs, four characteristics we might investigate are: central tendency, variation, shape of distribution, and stability. Which of the following tools would be most helpful to determine stability of the process?                                  

                       

Question 9

The histogram below showing ages of credit card holders displays what type of distribution?         

Question 10

Non-random and unpredictable patterns on a control chart indicate:                        

                       

                                   

Question 11

If you had the following residual plots what would be your concerns regarding the adequacy of the model associated with these residuals?                               

Question 12

The model residuals are examined to:                             

Question 13

Models based on subject matter fundamentals (theory) are generally better than statistical models for:                                   

Question 14

George Box tells us “all models are wrong but some are useful”. By this comment he means:                             

Question 15

Which of the following is NOT a reason for adjusted R-Square being low?                                                 

Question 16

This technique is used to eliminate the effects of nuisance factors (e.g., machines, day of week, and season of year) from an experiment.                               

 

Question 17

An aspect of good experimental strategy is to study the effects of the variables 

(Xs) over a wide range. This strategy increases the chances that effects will be found because:                         

                       

Question 18

In every experiment there is experimental error.  Which of the following statements is true?                              

Question 19

The basic reason for randomness of sampling in design of experiments is: 

Question 20  

In the experimental layout below, which are the most important factors?

Factor A	Factor B	Factor C	Y
-1	-1	-1	150
1	-1	-1	148
-1	1	-1	156
1	1	-1	158
-1	-1	1	137
1	-1	1	132
-1	1	1	145
1	1	1	147

                                            

Question 21

I have calculated an interval to document the uncertainty in my estimate of the long-term standard deviation I will experience in time to pay invoices in my business going forward. Baaed on this information, this should be considered what type of interval?                                   

                       

Question 22

A local university ran a regression model on factors impacting starting job salary of employed graduates. After validating this as a reasonable model, the university noted that the regression coefficient for GPA had a p-value of .10. Which of the following would be a reasonable conclusion in this case?                             

 

Question 23

For which of the following scenarios am I most likely to utilize a Chi-squared test?                                 

                       

Question 24

I have made a mistake in copying data into my computer to perform a large regression model with 20 independent variables. Basically, I ended up with random data in each of the columns. However, I accidentally ran the regression anyway. Making reasonable assumptions, which of the following outcomes is most likely?                           

                       

Question 25

We conducted a t test to compare the average cycle time to approve two different types of loans, auto and personal. The p-value for the t test was -.03, where the hypotheses were: